Improvement in pilot-wheel corn-planters



:. CAMPBELL.

PILOT-WHEEL CORN-PLANTER.

No. 169 621. Patented Nov.9, 1875.

N-PEIERS, PHOTO-UTHOGRAFMER, WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

JAMES CAMPBELL, OF HARRISON, OHIO.

IMPROVEMENT IN PILOT-WHEEL CORN-PLANTERS.

Specification forming part of Letters Patent No. 169,621, dated November9, 1875; application filed December 19,1874.

To all whom it may concern Be it known that I, JAMES CAMPBELL, ofHarrison, in the county of Hamilton and State of Ohio, have inventedcertain new and useful Improvements in Pilot-Wheel (Jorn- Drills, ofwhich the following is a specification:

My invention relates to new devices for changing the speed ofpilot-wheel corudrills at the will of the attendant when the same is inoperation; and consists in providing a pivoted grain-box with two setsof gearing and shafting-one upon each side of the pilotwheel and seedboxso that the seed-box may be instantly turned laterally on its pivot todrill the seed thicker or thinner, as desired, by employing either setof driving-gear, as desired.

Figure 1 is a perspective view of my im proved drill, with parts of thedriving-wheel broken off to show the gearing. Fig. 2 is a top plan viewof the same, with sections broken off to show the relative position ofthe operative parts of the driving mechanism.

A represents the frame of the drill; B, the pilot driving-wheel; O, thegrain-box; and D D, the driving-pinions, cast on each side of thedriving-wheel B. Two or more rows of pinion-teeth may be employed, ifdesired. E E represent shafts, mounted on brackets O P upon either sideof the machine, as shown in Fig. 2. a a represent beveled spur-wheels,which are at all times in mesh with pinions D D. The grain-box ispivoted to the frame at H by a single bolt passing loosely through theflange of the seed-box, so as to allow free lateral movement of thegrain box on the pivot. Gr represents a pinion, adapted to mesh intoworms F F alternately, as desired. H represents a handle or bale, firmlysecured to the rear of the seed-box. This handle bends over at the top,and hooks onto ratchet-bar I I I, which is secured to the brace betweenthe drill-handles. This handle H may [be secured or fixed in any one ofthe notches of ratchet I I by means of a spring, or by means of athimble.

When handle H is secured in the center of ratchet I I, as shown in Fig.2, the seeding mechanism isnot in gear, and the dropperplate isstationary.

When the handle H is moved to the right, and secured in the notches ofthe ratchet-bar I, the seed-box O and gear G are moved to the right,bringing into mesh pinion G and worm F, and the speed of thedropper-plate is given by the gearing upon the righthand side of thedrill, and in a similar manner motion is obtained by the gearing uponthe left-hand side of the drill, the construction of the two sets ofgearing being such that one set revolves the dropper-plate more rapidlythan the other, so that the attendant can instantly, while the drill isin operation, plant thicker or thinner, as he desires, by shifting fromthe right to the left hand driving-gear, without stopping the team foradjustment.

Having described my improvement, what I claim is v 1. The two sets ofdriving-gear, one upon each side of the frame, in combination with thepivoted grain-box G, adapted to shift the speed of the droppingmechanism while the drill is in operation, substantially as herein setforth.

2. In combination with the pivoted hopper, the shifting-lever H, andnotched adjust-ingbar, substantially as set forth.

In testimony whereof I have hereunto set my hand this 11th day ofDecember, 1874;.

J AMES CAMPBELL.

Witnesses I E. E. WOOD, J OHN OGARA.

